INSECTS AFFECTING FARK AND WOODLAND TREES 



223 



numbers in an infested orchard near Albany. The beetle, in its various 

 stages, is represented in the accompanying figure. It is quite convex in 

 shape and only ' ,g inch long. The twice stabbed lady beetle, Chile- 

 corns I) i V u 1 n e r u s Muls., is another native form kn^wn to fccxl on this 

 pest. The beetle may be recognized by its jet black color relieved by two 

 red spots on its wing covers. Several lad)- beetles introduced into California 

 were colonized on trees infested with San Jose scale, and of these, three 

 have since been discovered feeding on the pest. The\- an- Ore us 

 c h a 1 }■ b e u s, O. a u s t r a 1 a s i a e and .S c )• m n u s 1 o [ > h a n t h a e. 



There is another interesting natural enemy known as the Chinese lady 

 beetle, C h i 1 o c o r u s s i m i 1 i s Rossi, which has been recent))- introduced 

 by agents of the United .States 

 Department of Agriculture, 

 and may prove a valuable ally 

 in controlling this pernicious 

 scale insect, particularly in the 

 Southern States. It closel)- 

 resembles our native twice 

 stabbed lady beetle, C h i 1 o- j^ 

 c o r u s b i V u 1 n e r u s Muls., 

 presenting appreciable differ- 

 ences only in the larval stage. ^^ 

 Its general appearance and 

 habits are well shown in 

 figures 38 and 39. .Several 

 attempts have been made to 

 introduce this species in Xew 

 York State, and while it bred 

 freely several seasons, it does 

 not appear to have withstood 

 our severe winters and it is 

 very doubtful whether material benefit will result from its presence. It 



lu J8 Chinese lady I.eetle. Oviposilion .and early st.nges : n=bectk- 

 thnistiiiK ecg beneath scale; *=5Cale slightly raised showing cge 

 underneath; <-=scaIe elevated showing attachment of egg to its inner 

 surface; rt'^cgg within the scale; »-=^egg much enlarged to show- 

 sculpturing; y=eggs under flap of hark; ^=same, natural size; 

 //. /-dorsal and lateral views of recently hatched larvae; y-^sarae. 

 feeding on young and mature scales; all enlarged except g. (After 

 Marlatt, U. S. Uep't Agric. Vcar liook iqo2> 



